Suction cleaner filter bags



Aug. 27, 1957 w. 5. SECK 2,804,167

sucmou CLEANER FILTER BAGS Filed March 1, 1955 2 sneaks-sheet 1 Aug. 27, 1957 Filed March 1, 1955 w. G. SECK 2,804,167

SUCTION CLEANER FILTER BAGS 2 Sheets-Sheet 2 United States Paten'tO r2,804,167 7 'SUCTION CLEANER FILTER BAGS Werner G. Seek, Canton, Ohio,assignor to The Hoover Company, North Canton, Ohio, a corporation ofOhio Application March 1, 1955, Serial No. 491,299

9 Claims. (Cl. 183-51) The present invention relates to filter bagsadapted for use in suction cleaners.

An object of the invention is to provide a filter bag having a valve forclosing the bag inlet. Another object is to provide a filter bag havinga valve exteriorly thereof for movement to closed position withoutdisturbing the bag mounting. A further object is to provide a valveexteriorly of a filter bag and having a tab to lock the valve in closedposition. Another object is to provide a filter bag having a valveformed from the material which is cut to provide the bag inlet. Afurther object is to provide a mounting for the filter bag and a valveformed from the mounting. Other objects and advantages of theinventionwill become apparent from the following description anddrawings wherein:

Figure 1 is atop plan view of one embodiment of the filter bag with thevalve shown in open position,

Figure 2 is a section along the line 22 in Figure 1 and the bag arrangedin a suction cleaner,

Figure 3 is a top plan View of another embodiment of the inventionshowing the valve open,

Figure 4 is a section along the line 4-4 of Figure 3 and the bagarranged in a suction cleaner,

Figure 5 is a sectional detail of the valve of Figure 3 in closedposition, and

Figure 6 shows the valve locked in closed position.

The embodiment of the invention disclosed in Figures 1 and 2 comprises arectangular paper bag 10 having a filtering area formed from top andbottom walls 11 and 12 respectively, connected by side walls 13 providedwith a plurality of pleats 14 which extend between closed pinched ends15, and the pleats are unfolded when the bag is inflated. In the centerof the top wall 11 is an opening 16, and the area of the top walladjacent the opening 16 is cemented to a member 17 formed of relativelystiff paper. The marginal edge of the member 17 is unattached to the topwall 11 to provide a bag mounting flange 18.

An inlet 20 is provided in the member 17 in alignment with the bagopening 16 for entrance of dirt laden air into the bag. Formed in themember 17 is an integral hinge 21 from which extends a valve 22projecting laterally beyond the mounting flange 18 and the side wall ofthe bag, so that the valve 22 is easily grasped by the operator to moveit to closed position. The free end 23 of the valve is arcuate toconform to one half the periphery of the inlet 20. A locking tab 24 isformed on the end 23 of the valve and is adapted to enter the inlet 20to engage the lower surface of the member 17 adjacent the periphery ofthe inlet 20 to lock the valve in closed position as shown in dottedlines in Figure 1.

The bag is adapted to be arranged in a suction cleaner 25 provided witha suitable bracket 26 herein shown as having a U-shaped shoulder 27 toreceive the bag mounting flange 18 to support the bag. A cover 28 isprovided with a conduit 29 adapted to receive one end of an unshownsuction cleaner hose, the other end of the latter having a suitablesurface cleaning nozzle. A'ring of resilient material 30 about theconduit 29 has a surface 31 which engages the member 17' to form anairtight seal therewith for passage of dirt laden air from the hosethrough the conduit 29 to the inlet 20 into the bag 10 which removes thedirt from the air stream. A suitable unshown suction creating motor-fanunit is mounted on the cleaner to draw dirt laden air into the bag.

When the bag 10 is mounted in the cleaner the valve 22 is in its openposition and projects laterally beyond the mounting member 17 and theside wall of the bag. If it is desired to remove the bag from thecleaner the cover 28 is moved to open position to expose the bagmounting 17 and the valve 22. While the bag is supported on the cleanerbracket 26 the operator grasps the projecting valve 22 and pivots itabout the hinge 21 to insert the tab 24 through the inlet 20 intoengagement with the member 17 adjacent the periphery of the inlet tolock the valve in closed position. The bag is then removed from thesupporting U-shaped shoulder 27 and discarded. The valve 22 being lockedin closed position prevents escape of dirt from the bag opening 16through the inlet 20.

The embodiment of the invention disclosed in Figures 3 to 6 includes abag 39 provided with a member 40 cemented to the bag top wall 11 toprovide a mounting flange 41 which is seated in the U-shaped shoulder 27to support the bag in the suction cleaner. Formed in the member 40 is aninlet 42 in register with the bag opening 16. A valve 43 is formed bythe material cut from the member 40 in providing the inlet 42. A portionof the material forming the valve 43 is uncut from the member 40 toprovide an integral hinge 44 in the periphery of the inlet 42. Oppositethe hinge 44 on the valve 43 is a tab 45 formed from the periphery ofthe inlet 42. The tab is cut from the member 40 at angle as shown inFigure 5 to provide skewed lips 46 and 47, the latter being on the tab45 for movement inwardly of the lip 46 to lock the valve 43 in closedposition as shown in Figure 6.

The bag 39 is supported in the cleaner 25 by placing the flange 41 inthe U-shaped shoulder 27 and when the cover 28 is closed the gasket 30seats against the member 40 and the hinge 44 to provide an airtight sealbetween the conduit 29 and the bag inlet 42. When the bag is to beremoved from the cleaner the cover 23 is opened and the valve 43 whichprojects laterally beyond the bracket 26 and flange 41 is accessible tothe operator and is moved on its hinge 44 to close the inlet 42. The lip47 on the tab 45 is depressed inwardly of the lip 46 to lock the valve43 in closed position as shown in Figure 6 to prevent escape of dirtfrom the bag 39 when the latter is removed from the cleaner anddiscarded.

While I have shown and described several embodiments of my invention, itis to be understood that those embodiments are to be taken asillustrative only and not in a limiting sense. I do not wish to belimited to the particular structure shown and described but to includeall equivalent variations except as limited by the scope of the claims.

I claim:

1. A filter bag for use in suction cleaners comprising a body having anopening for dirt laden air, a member attached to said body and having aninlet registering with said opening, a valve for said inlet and formedby cutting said member to provide said inlet, and hinge means formed bythe remaining uncut portion of said member forming said inlet formovement of said valve to open and close said inlet.

2. A filter bag as described in claim 1, and said member secured to saidbody adjacent said opening to protion cleaner.

3. A filter bag as described in claim 1, and locking means formed by aninclined cut on said 'valvefiandthe periphery, of said inlet and adaptedtozoverlapiwhen said valve is closed to retain said valve in-closed;position.

4. A filterrbag for attachment to suction,v cleaners comprising abodyhavin'gian opening fordirtladen air, a mounting plate having an inletregistering with-said :opening and secured to said body adjacent thearea of said inlet to provide a flange free of said body for attachmentto a suction cleaner, a valve formed of. said-mounting plate andintegrally hinged thereto, exteriorly of said bag body and, extendingbeyond said mounting ,flange when in open position ;to be graspedyby theoperators hand for movement to close saidinlet, andllockingrneans onsaid valve engageable with the periphery of said inlet to retain saidvalve in its closed :position.

5.'A filter bag for use in suction cleaners comprising a body having anopening fordirt laden air, jainember attached to said body and havinganinlet registering with said opening, and a valve hinged on said memberfor movement exteriorly of said bag body to open and close said inlet,and said hinge being arranged on said member beyond the periphery ofsaid inlet.

6. A filter bag for use in suction cleaners comprising a body having anopening fordirt laden air, a member attached to said body and having aninlet registering with said opening, and a valve hinged on said memberfor movement exteriorly of said bag body to open and close said inlet,said hinge arranged on said member beyond the periphery of said inlet,and said valve extending beyond said member when in open position to begrasped by the operators hand for movement to close said inlet.

7. A filter bag for use in suction cleaners comprising a body having anopening for dirt laden air, a member attached to said body and having aninlet registering with said opening, and a valve hinged on said memberfor movement exteriorly of said bag body to open and close said inlet,said member secured to said body adjacent said opening to provide aflange free of said body for attachment to a, suction cleaner, and saidhinge arranged on'said member beyond the periphery of said inlet.

8. A filter bag for use in suction cleaners comprising a body having anopening for dirt laden air, a member attached to said body and having aninlet registering with said opening, and a valve hinged on said memberfor movement exteriorly of said 'bag body to open and close said inlet,and locking means on said valve engageable with the periphery of saidinlet to retain said valve in-closed position. i

9. A filter bag for use in suction cleaners comprising a body having anopening for dirt laden .air, a member attached to said body and havingan inlet registering with said opening, and a valve hinged on saidmember for movement exter'iorly of said bag bodyj to-open and close saidinlet, the hinge being arranged on said member beyond the periphery ofsaid inlet,"and locking means on said valve engageable with theperiphery of said inlet to retain said valve in closed position.

References Cited in the file of this patent UNITED STATES PATENTS1,782,064 Gray NOV. 18 1930 2,070,674 Muentener Feb. 16, 1937 2,596,808Lofgren May 13, 1952 2,649,926 Cranmer Aug. 25, 1953 2,686,330 WalesAug. 17, '1954

